CN114991844B - Intelligent mining pressure data acquisition and statistics method for fully mechanized coal mining face of coal mine - Google Patents
Intelligent mining pressure data acquisition and statistics method for fully mechanized coal mining face of coal mine Download PDFInfo
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- CN114991844B CN114991844B CN202210929142.0A CN202210929142A CN114991844B CN 114991844 B CN114991844 B CN 114991844B CN 202210929142 A CN202210929142 A CN 202210929142A CN 114991844 B CN114991844 B CN 114991844B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention provides a method for acquiring and counting mine pressure data of an intelligent fully mechanized coal mining face, belonging to the technical field of acquisition and counting of mine pressure data of the intelligent fully mechanized coal mining face; the technical problem to be solved is as follows: the improvement of the mining pressure data acquisition and statistical method of the intelligent fully mechanized coal mining face of the coal mine is provided; the technical scheme for solving the technical problems is as follows: the method comprises the following steps: collecting initial supporting force and cycle end resistance according to a primary coal mining cycle, and carrying out data statistics; the hydraulic support electrohydraulic control system is used for correlating the lifting action of the upright column, and the initial support force and the cycle end resistance are collected and counted through the support moving action; false, repeated and invalid data are effectively removed, and accurate data are finally provided for mine pressure judgment; the method is applied to mine pressure data acquisition of the fully mechanized coal mining face.
Description
Technical Field
The invention provides a method for acquiring and counting mine pressure data of an intelligent fully-mechanized coal mining face, and belongs to the technical field of acquisition and counting of mine pressure data of the intelligent fully-mechanized coal mining face.
Background
At present, 1 mine pressure monitoring substation is generally configured on each 10 supports of a fully mechanized mining face, and each substation is connected with a pressure sensor to acquire the column pressure of 1 support. The mine pressure monitoring system cannot cover all supports, and the judgment of initial supporting force and resistance at the end of circulation is only judged according to the change of pressure and a change rate algorithm, and the actions of the supports are not related.
Along with the development of coal mine intellectualization, more and more fully mechanized coal mining faces require to be provided with hydraulic support electrohydraulic control systems, pressure sensor data of all support stand columns of the working faces can be acquired through the electrohydraulic control systems, massive data can be effectively utilized, the change condition of roof pressure in the process of advancing along with the working faces can be monitored in real time, and therefore the mining safety can be enhanced, and effective support guarantee can be provided for mining equipment.
The invention effectively utilizes the hydraulic support electrohydraulic control system to collect the original and all mine pressure data of the fully mechanized coal mining face without arranging monitoring substations. The hydraulic support electrohydraulic control system is used for associating the lifting action of the upright column, the original algorithm based on the change of pressure and the change rate is changed, more reasonable collection and statistics are carried out on mine pressure data of the intelligent fully-mechanized coal mining face of the coal mine, and data support is provided for further accurately judging the coming pressure of the top plate.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the technical problems that: the improvement of the mining pressure data acquisition and statistics method of the intelligent fully mechanized mining face of the coal mine is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a mining pressure data acquisition and statistical method for an intelligent fully mechanized coal mining face of a coal mine comprises the following steps:
collecting initial supporting force and cycle end resistance according to a primary coal mining cycle, and carrying out data statistics;
the method for acquiring and counting the initial supporting force comprises the following steps:
when the support moves, T 10 Allowing to collect the setting force within the time; if T is 11 If primary support force collection is not completed within the time, giving up the collection;
at the same time, the support is specified to continuously raise the column T 12 Time and above, and the pressure of the upright post reaches P 0 Pressure and above, the effective column lifting action is considered, and T is counted after the column lifting of the support is finished 13 Taking the average value of the column pressure in time as the initial supporting force, and if the column lifting time is less than T 12 Time, or column pressure, less than P 0 The pressure, which is considered to be an ineffective lifting column action,abandoning the acquisition;
if the support rises to finish T 14 In time, effective lifting column action occurs again, the initial supporting force statistics is repeated, new statistical data are effective, and the last statistical data are discarded; if the support rises to the post and T is finished 15 No prop raising action exists in the time, and the collection of the initial supporting force in the coal mining cycle is completed;
the method for collecting and counting resistance at the end of circulation is as follows:
after the column descending action, counting the T before the column descending action occurs 20 Taking the maximum value of the column pressure in time as the cycle end resistance to be confirmed, and taking T after column descending 21 If the frame moving action occurs within the time, the maximum value is confirmed to be the resistance at the end of the cycle; if T after column descending 21 And if the moving rack action does not occur within the time, the record is abandoned.
And the primary coal mining cycle takes the frame moving action of the hydraulic support as a judgment standard.
The initial supporting force and the cycle end resistance are acquired through a mining intrinsic safety type pressure sensor arranged on a hydraulic control one-way valve of the lower cavity of the upright post.
The frame moving action is collected through a mining intrinsic safety type stroke sensor installed in the pushing oil cylinder.
The mining intrinsic safety type pressure sensor and the mining intrinsic safety type travel sensor are respectively connected with the support controller through leads, a group of mining intrinsic safety type pressure sensors, a group of mining intrinsic safety type travel sensors and a group of support controllers are respectively installed on one support, the plurality of support controllers are respectively connected with the end computer through wires or wirelessly, and the end computer is arranged on the crossheading train.
Compared with the prior art, the invention has the beneficial effects that: the invention combines the frame moving action to collect and count the initial supporting force and the cycle end resistance, effectively eliminates false, repeated and invalid data, and finally provides more accurate data for mine pressure judgment.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a hardware acquisition system according to the present invention;
FIG. 2 is a schematic time-series diagram of the initial force collection and statistics method of the present invention;
FIG. 3 is a schematic diagram of the variation process of the initial supporting force of the hydraulic support collected and counted by the invention, wherein the abscissa is the number of the support on the same working surface, and the ordinate is the initial supporting force value (the average value of the pressure in a specified time);
FIG. 4 is a schematic time-series diagram of the end-of-cycle resistance collection and statistics method of the present invention;
FIG. 5 is a schematic diagram of the process of collecting and counting the variation of the resistance at the end of the cycle, wherein the abscissa represents the stent number of the same working surface and the ordinate represents the end resistance value.
Detailed Description
As shown in fig. 1 to 5, the mining intrinsic safety type support controller, the mining intrinsic safety type pressure sensor and the end computer in the hydraulic support electrohydraulic control system are applied to the mining intelligent fully-mechanized working face mine pressure data acquisition and statistical method provided by the invention.
The mining intrinsic safety type support controller is installed on the support and connected with the mining intrinsic safety type pressure sensor through a cable connector. The mining intrinsic safety type pressure sensor is arranged on a hydraulic control one-way valve of the lower cavity of the upright post. The end computer is arranged on the crossheading train and is provided with special mine pressure monitoring software. The software has a data uploading function.
The initial supporting force acquisition method comprises the following steps: when the support moves, T 10 The initial force was allowed to be acquired for time (say 10 minutes); if T 11 If the primary force collection is not completed within 5 minutes, the collection is abandoned. At the same time, the support is continuously lifted 12 Time (assuming 4 seconds) and above, and column pressure reaches P 0 Pressures (assuming 18 MPa) and above are considered to be effective lifting; if the column lifting time is less than T 12 Time (assume 4 seconds) and column pressure less than P 0 Pressure (assuming 18 MPa) is considered to be ineffective lifting action. For effective column lifting action, counting T after the support column lifting is finished 13 Column pressure over time (assumed to be 1 minute)The force, the average of which was taken as the initial force. If the support rises to finish T 14 Within 2 minutes, repeating the statistics of the initial supporting force if effective column lifting action occurs again, wherein new statistical data are effective, and the last statistical data are discarded; if the support rises to the post and T is finished 15 And (3) no prop lifting action exists within the time (assumed to be 3 minutes), and the primary support force collection within the coal mining cycle is completed.
The method for acquiring the resistance at the end of the circulation comprises the following steps: after the column descending action, counting the T before the column descending action occurs 20 The column pressure over time (say 10 seconds) is taken to be the maximum as the end-of-cycle resistance to be confirmed. If T after column descending 21 If the frame moving action occurs within the time (20 seconds), confirming the resistance at the end of the cycle; if the column is descended T 21 If no racking motion occurs within the time (say 20 seconds), recording is abandoned.
According to the invention, the initial support force and the cycle end resistance of the bracket are related to the actual action of the bracket, the acquisition method is optimized according to the actual working conditions, false, repeated and invalid data are effectively eliminated, and finally, more accurate data are provided for mine pressure judgment.
The data acquisition is carried out through a mining intrinsic safety type bracket controller, a mining intrinsic safety type pressure sensor and a mining intrinsic safety type travel sensor; the mining intrinsic safety type support controller is installed on a support, the mining intrinsic safety type pressure sensor is installed on a hydraulic control one-way valve of a lower cavity of the upright post through a cable connector, the mining intrinsic safety type stroke sensor and the mining intrinsic safety type pressure sensor, and the mining intrinsic safety type stroke sensor is installed in the pushing oil cylinder.
It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules adopted in the present invention is determined and can be realized, except for the specific description in the embodiment, the specific connection relationship can bring the corresponding technical effect, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of the corresponding software program.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A mining pressure data acquisition and statistical method for an intelligent fully mechanized coal mining face is characterized by comprising the following steps: the method comprises the following steps:
collecting initial supporting force and cycle end resistance according to a primary coal mining cycle, and carrying out data statistics;
the method for acquiring and counting the initial supporting force comprises the following steps:
when the support moves, T 10 Allowing to collect the initial force within the time; if T is 11 If primary support force collection is not completed within the time, giving up the collection;
at the same time, the support is specified to continuously raise the column T 12 Time and above, and the pressure of the upright post reaches P 0 Pressure and above, the effective column lifting action is considered, and T is counted after the column lifting of the support is finished 13 Taking the average value of the column pressure in time as the initial supporting force, and if the column lifting time is less than T 12 Time, or column pressure, less than P 0 Pressure, namely considering the column lifting motion as non-effective, and abandoning the collection;
if the support rises to finish T 14 In time, effective lifting column action occurs again, the initial supporting force statistics is repeated, new statistical data are effective, and the last statistical data are discarded; if the support rises to the post and T is finished 15 No column lift within timeCompleting the collection of the initial supporting force in the coal mining cycle;
the collection and statistical method of the resistance at the end of the circulation is as follows:
after the column descending action, counting the T before the column descending action occurs 20 Taking the maximum value of the column pressure in time as the cycle end resistance to be confirmed, and taking T after column descending 21 If the frame moving action occurs within the time, the maximum value is confirmed to be the resistance at the end of the cycle; if the column is descended T 21 And if the moving rack action does not occur within the time, the record is abandoned.
2. The method for acquiring and counting mine pressure data of the intelligent fully mechanized coal mining face of the coal mine according to claim 1, wherein: and the primary coal mining cycle takes the frame moving action of the hydraulic support as a judgment standard.
3. The method for collecting and counting mine pressure data of the intelligent fully mechanized coal mining face of the coal mine according to claim 1, wherein: the initial supporting force and the cycle end resistance are acquired through a mining intrinsic safety type pressure sensor arranged on a hydraulic control one-way valve of the lower cavity of the upright post.
4. The method for acquiring and counting mine pressure data of the intelligent fully mechanized coal mining face of the coal mine according to claim 3, wherein: the frame moving action is collected through a mining intrinsic safety type stroke sensor arranged in a pushing oil cylinder.
5. The method for acquiring and counting mine pressure data of the intelligent fully mechanized coal mining face of the coal mine according to claim 4, wherein: the mining intrinsic safety type pressure sensor and the mining intrinsic safety type travel sensor are respectively connected with the support controller through leads, a group of mining intrinsic safety type pressure sensors, a group of mining intrinsic safety type travel sensors and a group of support controllers are respectively installed on one support, the plurality of support controllers are respectively connected with the end computer through wires or wirelessly, and the end computer is arranged on the crossheading train.
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| CN202210929142.0A CN114991844B (en) | 2022-08-03 | 2022-08-03 | Intelligent mining pressure data acquisition and statistics method for fully mechanized coal mining face of coal mine |
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| GB894292A (en) * | 1957-07-30 | 1962-04-18 | Mastabar Mining Equip Co Ltd | Improvements in or relating to hydraulic props, particularly pit props |
| CN102926787A (en) * | 2012-11-16 | 2013-02-13 | 无锡阳工机械制造有限公司 | Method for increasing setting load of hydraulic bracket |
| CN104747221B (en) * | 2015-01-16 | 2018-08-28 | 北京煤科天玛自动化科技有限公司 | A kind of coal-mine hydraulic support moves frame intelligent control method automatically |
| CN105092147A (en) * | 2015-07-27 | 2015-11-25 | 中国矿业大学 | Experiment teaching system and method for rock strata movement simulation and top board pressure monitoring |
| CN105484778B (en) * | 2015-11-27 | 2017-10-20 | 太原科技大学 | A kind of hydraulic support column economizer and control method |
| WO2020117143A2 (en) * | 2018-10-02 | 2020-06-11 | S Tek Madenci̇li̇k Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Semi mechanized hydraulic supported ceiling fortification. |
| CN109707427A (en) * | 2018-11-26 | 2019-05-03 | 彬县水帘洞煤炭有限责任公司 | Frame method and automatic chock moving type hydraulic bracket system are moved automatically under a kind of mine |
| CN110929384A (en) * | 2019-10-29 | 2020-03-27 | 青岛本末岩控技术有限公司 | Mine pressure big data real-time analysis system and method based on fully mechanized coal mining face |
| CN111678683B (en) * | 2020-06-08 | 2022-05-13 | 中国矿业大学 | Method and device for predicting roof pressure of intelligent fully mechanized coal mining face of coal mine |
| CN111681125B (en) * | 2020-07-08 | 2023-06-02 | 神华神东煤炭集团有限责任公司 | Top plate pressure calculation method, storage medium, and electronic apparatus |
| CN112145231A (en) * | 2020-08-20 | 2020-12-29 | 中煤科工开采研究院有限公司 | Early warning method for working condition of hydraulic support |
| CN112302720B (en) * | 2020-09-30 | 2023-02-28 | 中煤科工开采研究院有限公司 | Method and system for judging initial supporting force and cycle end resistance of working surface hydraulic support |
| WO2022141581A1 (en) * | 2020-12-31 | 2022-07-07 | 山东科技大学 | Hydraulic support double-cavity post jack structure and energy-absorption, impact-resistance and constant-resistance method thereof |
| CN113323697B (en) * | 2021-05-31 | 2023-11-03 | 国能神东煤炭集团有限责任公司 | Bracket initial supporting force and working resistance recognition method, storage medium and electronic equipment |
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